Responsive design: The front-end engineer creates responsive designs that adapt to different screen sizes, ensuring that the application looks good and functions well on desktops, tablets, and mobile devices.

Cross-browser compatibility: The front-end engineer ensures that the application works seamlessly on a variety of modern and legacy browsers, regardless of the user's device or operating system.

Accessibility: The front-end engineer takes into consideration accessibility standards and implements features such as alt text, keyboard navigation, and semantic markup to make the application usable for people with disabilities.

Documentation: The front-end engineer creates documentation that explains how the application's UI works, how to maintain it, and how to make future changes.